condition mean min max ZT0-3 14.480446257 9.812354704 19.14853781 ZT4-7 9.80009181425 9.2697637035 10.330419925000001 ZT8-11 14.480263848 12.112892661 16.847635035 ZT12-15 13.8927202775 13.88824767 13.897192884999999 ZT16-19 11.293024639999999 10.286152965 12.299896315 ZT20-23 9.2235510945 8.4073111935 10.0397909955